Well, it's not the mark to which I was referring. I think it to be that of a forge or tubemaker. Anschultz has the mark of a shield with his initials and I've seen the "S" in a shield on German target arms; therefore, similar to guilty by association, I guess it to be on of the tube makers of Zella-Mehlis. Is there a Krupp stamp, or any other metal type stamp, anywhere on the tubes(around the breech end)?? Much better pic by the way.

Kind Regards,

Raimey
rse